Officials say they received calls about the fire at the Beretta USA Inc. plant in Accokeek early Monday. They say flames started in a building attached to the main plant. The fire extended to the roof of the main building, causing part of the roof to collapse.

No one was injured.

Hazmat crews also responded because officials say there are chemical products at the plant that are used to make firearms.

Officials are investigating what caused the fire. Damage is estimated at $250,000.